syzkaller login: [ 31.585020] BUG: Bad rss-counter state mm:00000000b667fef4 type:MM_FILEPAGES val:33 [ 31.585599] BUG: Bad rss-counter state mm:00000000b667fef4 type:MM_ANONPAGES val:22 [ 31.771383] ================================================================== [ 31.772421] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.773304] Read of size 8 at addr ffff8880196ce968 by task sshd/220 [ 31.774126] [ 31.774336] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 31.775151] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.776088] Call Trace: [ 31.776393] [ 31.776662] dump_stack_lvl+0x91/0xf0 [ 31.777128] print_report+0xcc/0x620 [ 31.777629] ? __virt_addr_valid+0x102/0x340 [ 31.778202] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.778845] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.779512] kasan_report+0xbe/0xf0 [ 31.779991] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.780616] vma_interval_tree_remove+0xc75/0xec0 [ 31.781213] vma_prepare+0xc54/0x11a0 [ 31.781696] __split_vma+0x5af/0x950 [ 31.782167] ? __pfx___split_vma+0x10/0x10 [ 31.782691] ? find_held_lock+0x2c/0x110 [ 31.783207] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.783786] ? lock_is_held_type+0x9f/0x120 [ 31.784333] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.784943] ? mtree_range_walk+0x632/0x900 [ 31.785497] ? mas_walk+0x5c7/0x7c0 [ 31.785987] do_vmi_munmap+0x1f1/0x2b0 [ 31.786477] mmap_region+0x1f9/0x2660 [ 31.786960] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.787493] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.788206] ? __pfx_lock_acquire+0x10/0x10 [ 31.788751] ? __pfx_mmap_region+0x10/0x10 [ 31.789277] ? security_mmap_addr+0x7d/0xa0 [ 31.789804] ? get_unmapped_area+0x1f5/0x3f0 [ 31.790352] do_mmap+0x854/0xf00 [ 31.790794] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.791289] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.791864] ksys_mmap_pgoff+0x3af/0x500 [ 31.792376] do_syscall_64+0x3f/0x90 [ 31.792846] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.793497] RIP: 0033:0x7f4efbfb3d82 [ 31.793955] Code: eb aa 66 0f 1f 44 00 00 41 f7 c1 ff 0f 00 00 75 27 55 48 89 fd 53 89 cb 48 85 ff 74 33 41 89 da 48 89 ef b8 09 00 00 00 0f 05 <48> 3d 00 f0 ff ff 77 56 5b 5d c3 0f 1f 00 c7 05 ae 03 01 00 16 00 [ 31.796091] RSP: 002b:00007ffc39eccc98 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.796993] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f4efbfb3d82 [ 31.797833] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f4efb3ed000 [ 31.798687] RBP: 00007f4efb3ed000 R08: 0000000000000009 R09: 0000000000001000 [ 31.799543] R10: 0000000000000812 R11: 0000000000000206 R12: 000055870c74bec0 [ 31.800394] R13: 00007ffc39ecccb0 R14: 00007ffc39eccce0 R15: 00007ffc39ecd040 [ 31.801250] [ 31.801546] [ 31.801760] Allocated by task 213: [ 31.802191] kasan_save_stack+0x22/0x50 [ 31.802705] kasan_set_track+0x25/0x30 [ 31.803198] __kasan_slab_alloc+0x59/0x70 [ 31.803734] kmem_cache_alloc+0x16b/0x370 [ 31.804246] vm_area_dup+0x20/0x160 [ 31.804698] __split_vma+0x170/0x950 [ 31.805160] split_vma+0xc6/0x110 [ 31.805595] mprotect_fixup+0x8d2/0xb30 [ 31.806104] do_mprotect_pkey+0x87e/0xd40 [ 31.806627] __x64_sys_mprotect+0x78/0xc0 [ 31.807145] do_syscall_64+0x3f/0x90 [ 31.807633] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.808274] [ 31.808488] Freed by task 213: [ 31.808876] kasan_save_stack+0x22/0x50 [ 31.809382] kasan_set_track+0x25/0x30 [ 31.809871] kasan_save_free_info+0x2b/0x50 [ 31.810397] __kasan_slab_free+0x10a/0x190 [ 31.810924] kmem_cache_free+0x10d/0x4d0 [ 31.811436] rcu_core+0x8c8/0x2860 [ 31.811900] __do_softirq+0x1b7/0x7d4 [ 31.812379] [ 31.812594] Last potentially related work creation: [ 31.813177] kasan_save_stack+0x22/0x50 [ 31.813678] __kasan_record_aux_stack+0x8e/0xa0 [ 31.814248] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.814893] remove_vma+0x139/0x170 [ 31.815351] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.815928] do_vmi_munmap+0x1f1/0x2b0 [ 31.816412] __vm_munmap+0x138/0x3a0 [ 31.816881] __x64_sys_munmap+0x59/0x80 [ 31.817382] do_syscall_64+0x3f/0x90 [ 31.817853] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.818503] [ 31.818718] The buggy address belongs to the object at ffff8880196ce910 [ 31.818718] which belongs to the cache vm_area_struct of size 168 [ 31.820195] The buggy address is located 88 bytes inside of [ 31.820195] freed 168-byte region [ffff8880196ce910, ffff8880196ce9b8) [ 31.821589] [ 31.821808] The buggy address belongs to the physical page: [ 31.822468] page:000000009517d341 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x196ce [ 31.823567] memcg:ffff888016455101 [ 31.823994] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.824644] page_type: 0xffffffff() [ 31.825099] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 31.826022] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888016455101 [ 31.826922] page dumped because: kasan: bad access detected [ 31.827596] [ 31.827814] Memory state around the buggy address: [ 31.828409] ffff8880196ce800: fc fc fc fc fc 00 00 00 00 00 00 00 00 00 00 00 [ 31.829271] ffff8880196ce880: 00 00 00 00 00 00 00 00 00 00 fc fc fc fc fc fc [ 31.830121] >ffff8880196ce900: fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.830970] ^ [ 31.831754] ffff8880196ce980: fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc fa [ 31.832605] ffff8880196cea00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.833458] ================================================================== [ 31.834511] Disabling lock debugging due to kernel taint [ 34.069599] BUG: Bad rss-counter state mm:0000000043d5c0b4 type:MM_FILEPAGES val:33 [ 34.070886] BUG: Bad rss-counter state mm:0000000043d5c0b4 type:MM_ANONPAGES val:22 [ 34.549892] BUG: Bad rss-counter state mm:0000000072ff39ab type:MM_FILEPAGES val:33 [ 34.551115] BUG: Bad rss-counter state mm:0000000072ff39ab type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:29983' (ECDSA) to the list of known hosts. 2023/06/19 11:23:56 fuzzer started 2023/06/19 11:23:56 dialing manager at localhost:44161 2023/06/19 11:23:56 checking machine... 2023/06/19 11:23:56 checking revisions... [ 35.237681] kmemleak: Automatic memory scanning thread ended 2023/06/19 11:23:56 testing simple program... [ 35.292454] cgroup: Unknown subsys name 'net' [ 35.341699] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 11:23:54 Registers: info registers vcpu 0 RAX=0000000000000002 RBX=00000000ffffffff RCX=00007f8440d49500 RDX=0000000000000003 RSI=0000555dafda53f8 RDI=1999999999999999 RBP=00007ffc8527bc98 RSP=00007ffc8527bc70 R8 =0000000000000002 R9 =0000000000000000 R10=00007f8440d28ac0 R11=00007f8440d293c0 R12=fffffffffffffdf8 R13=00007ffc8527bca7 R14=0000000000000000 R15=0000555dafda53f7 RIP=00007f8440cd207b RFL=00000202 [-------] CPL=3 II=0 A20=1 SMM=0 HLT=0 ES =0000 0000000000000000 00000000 00000000 CS =0033 0000000000000000 ffffffff 00a0fb00 DPL=3 CS64 [-RA] SS =002b 0000000000000000 ffffffff 00c0f300 DPL=3 DS [-WA] DS =0000 0000000000000000 00000000 00000000 FS =0000 00007f84407c3900 00000000 00000000 GS =0000 0000000000000000 00000000 00000000 LDT=0000 fffffe0000000000 00000000 00000000 TR =0040 fffffe0000003000 00004087 00008b00 DPL=0 TSS64-busy GDT= fffffe0000001000 0000007f IDT= fffffe0000000000 00000fff CR0=80050033 CR2=00007f8440d7a618 CR3=000000000e462000 CR4=00350ef0 DR0=0000000000000000 DR1=0000000000000000 DR2=0000000000000000 DR3=0000000000000000 DR6=00000000ffff0ff0 DR7=0000000000000400 EFER=0000000000000d01 FCW=037f FSW=0000 [ST=0] FTW=00 MXCSR=00001f80 FPR0=0000000000000000 0000 FPR1=0000000000000000 0000 FPR2=0000000000000000 0000 FPR3=0000000000000000 0000 FPR4=0000000000000000 0000 FPR5=0000000000000000 0000 FPR6=0000000000000000 0000 FPR7=0000000000000000 0000 XMM00=563412feff00545000000000000080fe XMM01=6e69676f6c5f6d61702c78756e696c65 XMM02=755f6d61702c74696d7265705f6d6170 XMM03=2c766e655f6d61702c7374696d696c5f XMM04=6d61702c766e655f6d61702c7374696d XMM05=78696e755f6d61702c74696d7265705f XMM06=6469756e69676f6c5f6d61702c78756e XMM07=672065736f6c635f6e6f69737365733a XMM08=61662029286e65706f5f746964756100 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=ffff88806cf35000 RBX=0000000000000001 RCX=ffffffff8450c50e RDX=ffffed100d9e6a01 RSI=0000000000000004 RDI=ffffffff812889a5 RBP=dffffc0000000000 RSP=ffff888008e27e70 R8 =0000000000000000 R9 =ffffed100d9e6a00 R10=ffff88806cf35003 R11=0000000000000001 R12=ffffffff85d3bed0 R13=1ffff110011c4fd3 R14=0000000000000000 R15=0000000000000000 RIP=ffffffff8450d49f RFL=00000246 [---Z-P-] CPL=0 II=0 A20=1 SMM=0 HLT=1 ES =0000 0000000000000000 00000000 00000000 CS =0010 0000000000000000 ffffffff 00a09b00 DPL=0 CS64 [-RA] SS =0018 0000000000000000 ffffffff 00c09300 DPL=0 DS [-WA] DS =0000 0000000000000000 00000000 00000000 FS =0000 0000000000000000 00000000 00000000 GS =0000 ffff88806cf00000 00000000 00000000 LDT=0000 fffffe0000000000 00000000 00000000 TR =0040 fffffe000004a000 00004087 00008b00 DPL=0 TSS64-busy GDT= fffffe0000048000 0000007f IDT= fffffe0000000000 00000fff CR0=80050033 CR2=00007f5027238170 CR3=000000000a0aa000 CR4=00350ee0 DR0=0000000000000000 DR1=0000000000000000 DR2=0000000000000000 DR3=0000000000000000 DR6=00000000ffff0ff0 DR7=0000000000000400 EFER=0000000000000d01 FCW=037f FSW=0000 [ST=0] FTW=00 MXCSR=00001f80 FPR0=0000000000000000 0000 FPR1=0000000000000000 0000 FPR2=0000000000000000 0000 FPR3=0000000000000000 0000 FPR4=0000000000000000 0000 FPR5=0000000000000000 0000 FPR6=0000000000000000 0000 FPR7=0000000000000000 0000 XMM00=2035353a33323a3131203931206e754a XMM01=73732878696e755f6d6170203a5d3932 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3932325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732035353a33323a3131203931 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000